Mechanism for shaking out molds



June 24, 1930.

E. S. CARMAN MECHANISM FOR SHARING OUT HOLDS Filed Jan. 14. 1927 3Sheets-Sheet 1 7700 7 Level INVENTOR. f

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June 24, 1930. E. s. CARMAN MECHANISM FOR SHARING OUT HOLDS Filed Jan.14, 1927 3 Sheets-Sheet 3 INVENTOR. idea-2'21 6. 65207242:

ATTORNEYS.

Patented June 24, 1930 UNITED STATES PATENT OFFICE EDWIN S. CARMAN, OFEAST CLEVELAND, OHIO, ASSIGNOR TO THE OSBORN MANU- FACTURING COMPANY, OFCLEVELAND, OHIO, A CORPORATION OF OHIO MECHANISM FOR SHARING OU'I. MOLDSApplication filed January 14, 1927. Serial No. 161,224.

The present improvements relate more particularly to a jolt mechanismfor shaking the sand out of mold parts and to the method exemplified inthe operation of such mechanism. The sand is necessarily tamped orotherwise rendered compact in a mold before the casting operation andthe latter has a tendency more or less to bake or cake the sand so thatthe dislodgement of the latter from the mold after it has been used isnot an easy matter especially when gaggers or spills occur in the sand.Furthermore, such foreign matter requires to be carefully removed if thesand is to be used over again.

The object of the present invention accordingly, as indicated, is toprovide a simple and compact mechanism for the purpose stated, wherebythe removal of the contents of a mold may be greatly expedited andwhereby gagso gers, spills, nails or any other foreign matter in thesand will be simultaneously separated therefrom.

To the accomplishment of the foregoing and related ends, the invention,then, consists of the means hereinafter fully described and particularlypointed out in the claims, the annexed drawings and the followingdescription setting forth in detail certain mechanism embodying theinvention, such disclosed means constituting, however, but one ofvarious mechanical forms in which the principle of the invention may beused.

In said annexed drawings Fig. 1 is a side elevation of one form of myimproved mechanism for shaking out molds, the foundation support of-saidmechanism being shown in section; Fig. 2 is an end elevation of thesame; Fig. 3 is a broken top plan view of the mechanism shown in Figs. 1and 2; Fig. 4 is a side elevational view similar to that of Fig. 1 butshowing a modification in construction; Fig. 5 is an end elevation ofstill another modified form; and Figs. 6 and 7 are a plan view and sideelevation, respectively showing a mechanism of the type in hand inassociation with means for bringing the mold parts thereto and removingthe same therefrom.

The form of the machine illustrated in Fig. 1 includes two similar,vertically disposed jolt mechanisms 1 and 2 that are supported inhorizontally spaced relation on a concrete or equivalent solidfoundation 3 and are sunk below the floor level so that the tops orreciprocating elements 1 and 2 of said jolt mechanisms project only ashort distance above such floor level. The jolt mechanisms are ofstandard construction and so need not be described in detail, air fortheir actuation being supplied thereto through pipes 1 and 2" from anysuitable source and such supply being controlled so that the mechanismsmay be actuated separately or simultaneously as desired.

Bridging the space between the tops 1' and 2 of the two jolt mechanismsis a grating platform 5 which may be either of the assembledconstruction, as best shown in Fig. 3, or a casting with suitable slotstherein. The respective ends of this platform are pivotally attached toheads 6 and 7 that rest on the corresponding tops of the joltmechanisms, as clearly shown in Fig. 1. As a result, actuation of eitheror both of said jolt mechanisms will impart a corresponding joltingaction to the platform. Preferably movement of the jolt tables 1 and 2will not be synchronized so that an irregular and variable movement willthus be imparted to the platform in question. Accordingly, the contentsof the mold part, e. g. a flask, when the latter is placed upside downon a grating pggtfqlrm, will be quickly and effectively dis- 'I he sandwill drop throughthe platform and is guided by plates 8 and 9 on heads 6and 7, respectively, into a hopper or bin 10 located between the joltmechanisms, such hopper having downwardly converging walls and being"arranged to discharge its contents into 90 the boot of an elevator 11 bymeans of which the sand is raised above the -floor level there to bedelivered onto a suitable conveying mechanism (not shown).

In place of having both ends of the grating 95 platform pivotallysupported on a jolt mechanism, only one such end may be thus suprted,this being the arrangement shown in ig. 4 where theplatform 15, shownwith a mold B resting thereon, is pivoted at 100 its right-hand end to astationary sup-.

port 16, the opposite end slidably resting on the top or reciprocabletable 17 of a jolt mechanism 18. The operation of this form of themachine will be substantially the same as that of the one firstdescribed, the range of movement of the end of the platform that isjolted being such as to carry such end an equal distance above and belowa horizontal plane passing through the pivotal support of the other endso as to minimize the iendency of the mold B to slide off the platorm.

In Fig. 5 the grating platform 20 is shown as wholly supported on asingle jolt mechanism 21 and the latter instea of being sup ported on afixed foundation is carried by means of a truck 22 so that the machineas a whole may be transported, e. g. on rails 23, to wherever it isrequired for use.

The platform 20 is in effect a box-like structure wherein the grating 20is inclined to the horizontal, an oppositely inclinin partition 20serving to direct the sand as it rops from the mold onto such grating.Solid objects in the sand which do not pass'through the grating passthrough a space between partition 20 and the latter into a tailingstrough 20, while the sand drops directly down around the jolt mechanismand through the frame of the truck 22, which is left open for thepurpose, onto the floor.

The form of shaking-out machine illustrated in Figs. 6 and 7 issubstantially identical with that shown in Figs. 1 and 2, comprising twosimilar vertically disposed jolt mechanisms 25 and 26, upon which issupported a' grating platform 27 The latter differs from platform 5 inthe first described construction (that of Figs. 1 and 2) principally inthat the bars com osing the grating are transversely instead oflongitudinally disposed.

The molds 28 are brought one after the other into position alongside thegrating platform 27 by means of a conveyor 29 of any suitable type. Suchconveyor is shown diagrammatically only in Figs. 6 and 7 but willpreferably include a track 30 along which may be moved a series ofplates or trays 31. The molds 28 are placed in inverted position on suchtrays and when a mold is brought into proper position alongside theshake-out machine, the conveyor is temporarily stopped and a piston 32,operated by means of an air cylinder 33 or equivalent pushing mechanism,is utilized to shove such mold oil the tray onto the grating platform27. Thereupon the conveyor is operated to bring another mold intosimilar position ready to be transferred to the shake-out machine. Assoon as the shaking out operation is completed, the empt mold is movedin an endwise direction 0 the grating platform onto a gravity roller orequivalent conveyor 35 whereby it is returned to the proper station foruse over again. The sand after dropping through the grating platform isreceived into a discharge chute 36, located below the floor level, bywhich it is directed onto a conveyor belt 37 or equivalent means,designed to return such sand to storage.

As previously described, the jolting units are designed for actuation bycompressed air and the control valves are designed for independentoperation. Accordingly, while the cylinders of said jolting units maywork in unison with each other, by a simple adjustment of the valvesboth the time required to make a stroke and the length of the stroke ofthe respective cylinders may be independently varied in the case of thetwo units. The resultant action on the grating platform, and thus on amold supported by the latter, is not only to jolt such mold but also toshake it; that is, the mold is simultaneously thrown up and down andfrom side to side. The combined effect of these two movements has beenfound in actual practice to be extremely efficacious in quickly andcompletely dislodging the contents of the mold (sand and casting) nomatter how hard the sand may have been packed.

Other modes of applying the principle of my invention may be em loyedinstead of the one explained, change eing made as regards the means andthe steps herein disclosed, provided those stated by any of thefollowing claims or their equivalent be employed.

I therefore particularly point out and distinctly claim as my inventionv 1. In a device of the character described, the combination of twospaced jolt mechanisms, and a grating platform carried at its ends onreciprocatory elements of said mechanisms, respectively, said platformbeing adapted to receive a mold in position for shaking the sandtherefrom.

2. In a device of the character described, the combination of two spacedjolt mechanisms, and a grating platform pivotally attached at its endsto .reciprocatory elements of said mechanisms, respectively, saidplatform being adapted to receive a mold in position for shaking thesand therefrom.

3. In a device of the character described, the combination of two spacedjolt mechanisms, means adapted independently to control the operation ofsaid mechanisms, and a grating platform carried at its ends onreciprocatory elements of said mechanism, respectively, said platformbeing adapted to receive a mold in position for shaking the sandtherefrom.

4. In a device of the character described, the combination of two spacedpneumatically operated jolt mechanisms, independent control means forsaid mechanisms, and a ating platform carried at its ends onreciprocatory elements of said mechanisms, respectively, said platformbeing ada ted to receive 2r mold in position for shaking t e sand there-V 5. In mechanism of the character described, the combination of twospaced 'olt cylinders, pistons reciprocable in said cylinders, and agrating platform carried at its ends on said pistons, respectively, saidplatform being adapted to receive a mold in position for shaking thesand therefrom.

6. In mechanism of the character described, the combination of twospaced olt cylinders,

pistons reciprocable in said cylinders, an element loosely mounted onthe upper end of each of said pistons, and a platform pivotally attachedat its ends to said elements, respectively, said platform being adaptedto receive a mold in position for shaking the sand therefrom.

7 In mechanism of the character described, the combination of two spacedjolt cylinders, pistons reci rocable in said cylinders, means adaptedinependently to control the reciprocation of said pistons, and a gratingplatform carried at its ends on said pistons, respectively, saidplatform being adapted to receive a mold in position for shaking thesand therefrom.

8. In mechanism of the character described, the combination of a joltcylinder, a piston reciprocable in said cylinder, a head mounted on theupper end of said piston for transverse movement with respect to saidpiston, and a grating platform having its one end pivotally attached tosaid head, said platform being adapted to receive a mold in position forshaking the sand therefrom.

9. In mechanism of the character described, the combination of a joltcylinder, a piston reciprocable in said cylinder, a head mounted on theupper end of said piston for transverse movement with respect to saidpiston, means to limit such transverse movement, and a grating platformhaving its one end ivotally attached to said head, said platform eingadapted to receive a mold in position for shaking the sand therefrom.

10. In mechanism of the character described, the combination of a joltcylinder, a piston reciprocable in said cylinder, a head mounted on theupper end of said piston for transverse movement with respect to saidpis ton, means on said head and co-operable with said cylinder to limitsuch transverse movement, and a grating platform having its one endpivotally attached to said head, said platformbeing adapted to receive amold in position for shaking the sand therefrom.

Signed by me this 3 day of J an., 1927.

EDWIN S. CARMAN.

